James o



(No Model.)

J. 0. ALTIGK.

ELLIPTIG SPRING.

No. 348,710. Patented Sept. 7, 1886.

Wsses: lumen/Z021 W (9 MM, Q? fife/W N4 PETERS, PMluLilhogv-mpher.Washington, D. C,

UNITED STATES PATENT OFFICE.

JAMES O. ALTIOK, OF DAYTON, OHIO, ASSIGNOR OF ONE-HALF TO DANIEL WEAVER,OF SAME PLACE.

ELLIPTIQSPRING.

SPECIFICATION forming part of Letters Patent No. 348.710, datedSeptember 7, 1886.

Application filed November 18, 1885. Serial No. 183,192. (No model.)

To all whom it may concern:

Be it known that I, J AMES 0. ALTIcK, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented a certain new and useful Improvement in Elliptic Springs; and Ido hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it ap pertains to make and use the same, reference beinghad to the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

My invention relates to improvements in elliptic springs; audit consistsof two leaves of steel with an intervening leaf of hard wood, or allmaybeof steel with the upper andlower halves joined by clamps united bybolts, said clamps embracing the ends of the leaves.

The objects are to produce a light and cheap spring, which will besubstantially united at the joints thereof. I attain these objects bythe mechanism illustrated in the accompanying drawings, in which- Figure1 is a front view of the elliptic spring. Fig. 2 is a fragmentaryenlarged view of one end. Fig. 3 is an under side view of the jointclamp or box.

O O are steel bars, bent in proper form for an elliptic spring, the endsbeing bent to form a concavity conforming to the surface of thecylindrical thimble E, upon which said ends have a bearing. The relationof these parts in contact are shown at Fig. 2, where the embracing-clampD is illustrated in section.

A A are the external leaves of the spring, and B Bare intermediateleaves of hard wood, the whole being united by bolts at the center.Steel or other substance may be substituted for the hard-wood leaves.The upper and lower clamping-joints are alike, with the exception thatthe ears of the upper embrace those of the lower.

At D, Fig. 3, is an under view of the jointclamp, of which F is a barattached to the sides, with space beneath for the reception of the endsof the leaves. The cars are perforated for the bolt 0, and beneath thisbolt. is a concavity corresponding to that of the curved ends of theinternal leaves.

The parts of the spring are put together thus: Between the ends of theinner leaves are placed the thimbles E. Over these ends are placed thejoint-clamps D, and these are connected by bolts, which pass through theears and the hollow thimble. Then the other leaves are placed within thejoint-clamps, and these leaves are all united by bolts at the center ofthe leaves, as is usual.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is

I. An elliptic spring with inner leaves having curved ends to embracethimbles, the jointclamps with ears for a bolt, concavity for the bentend of said inner leaves and bar integral thereof across the back end,to unite the halves of said spring by embracing the intermediate woodenand external steel leaves, substantially as set forth.

2. The joint-clamp D, having ears for the j oiningbolt, concavity forcurved ends of steel leaves and bar integral thereof across the back andto embrace the leaves composing a spring, combined with athimble-bearing for the inner leaves, substantially as set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

JAMES O. ALTIOK.

Witnesses:

B. PIOKERING, SUMNER T. SMITH.

